Effects of swine manure composting by microbial inoculation: Heavy metal fractions, humic substances, and bacterial community metabolism

Li, Changning; Li, Haiyun; Tuo, Yao; Su, Ming; Ran, Fu; Li, Jianhong; He, Li; Chen, Xin; Zhang, Chen; Qiu, Huizhen

doi:10.1016/j.jhazmat.2021.125559

Cited by 74 publications

(5 citation statements)

References 55 publications

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“…Overall, the yields in this work were much higher than the reported HLA(2.6%-19.9%) and FLA results (3.72%-30.0%) via composting of food wastes [31][32][33] or manure [34][35][36] , presumably because no organic matter was consumed through microbial metabolism.…”

Section: Resultscontrasting

confidence: 68%

Radical-induced rapid humification of waste milk and the performance of derived slow release fulvic-like fertilizer

Zhu

Cao

Wang

et al. 2023

Preprint

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The direct disposal of waste milk (WM) leads to severe environmental pollution and resource loss. Considering the high content of nutrients, WM has a potential as an ideal raw material for organic fertilizer. In this work, base-activated persulfate (KOH/PS) was used as a new artificial humification technology to transform WM into product with 45.3% of fulvic-like acid (FLA) and 18.9% of humic-like acid (HLA) in 1 hour. Therein, FLA had more active groups (-COOH, -CNOH, -OH) than natural fulvic acid likely owing to hydroxylation, carboxylation and the Millard reaction. Reactive species of •OH and SO4−• generated in KOH/PS system may be related to degradation or polymerization reactions during humification. The product was mixed with attapulgite to fabricate a slow-release nano FLA fertilizer which could increase the yield of chickweeds by 107% compared with the blank as well as the abundance of beneficial bacteria in soil. Overall, this study provided a rapid method for the recycling of waste food and highly-concentrated organic wastewater, which may have a huge application prospect in sustainable agriculture.

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Section: Resultscontrasting

confidence: 68%

Radical-induced rapid humification of waste milk and the performance of derived slow release fulvic-like fertilizer

Zhu

Cao

Wang

et al. 2023

Preprint

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“…Myxococcota is considered to have a critical role in the turnover of biochar and other unstable organic matter in soil ecosystems [48]. Soil organic matter produces acid and amide compounds during decomposition, and Methylomirabilota can accelerate the decomposition of organic matter by promoting the synthesis of organic acid compounds [49,50]. The increase in the relative abundance of Methylomirabilota indicates that the interruption after short-term N additions promotes soil carbon cycling.…”

Section: Changes In Soil Bacterial Structure At the Phylum Level Befo...mentioning

confidence: 99%

Interruption after Short-Term Nitrogen Additions Improves Ecological Stability of Larix olgensis Forest Soil by Affecting Bacterial Communities

Qu,

Zhao,

Yan

et al. 2024

Microorganisms

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Atmospheric nitrogen deposition can alter soil microbial communities and further impact the structure and function of forest ecosystems. However, most studies are focused on positive or negative effects after nitrogen addition, and few studies pay attention to its interruption. In order to investigate whether interruption after different levels of short-term N additions still benefit soil health, we conducted a 2-year interruption after a 4-year short-term nitrogen addition (10 and 20 kg N·hm−2·yr−1) experiment; then, we compared soil microbial diversity and structure and analyzed soil physicochemical properties and their correlations before and after the interruption in Larix olgensis forest soil in northeast China. The results showed that soil ecological stabilization of Larix olgensis forest further improved after the interruption compared to pre-interruption. The TN, C:P, N:P, and C:N:P ratios increased significantly regardless of the previous nitrogen addition concentration, and soil nutrient cycling was further promoted. The relative abundance of the original beneficial microbial taxa Gemmatimonas, Sphingomonas, and Pseudolabrys increased; new beneficial bacteria Ellin6067, Massilia, Solirubrobacter, and Bradyrhizobium appeared, and the species of beneficial soil microorganisms were further improved. The results of this study elucidated the dynamics of the bacterial community before and after the interruption of short-term nitrogen addition and could provide data support and a reference basis for forest ecosystem restoration strategies and management under the background of global nitrogen deposition.

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“…The supernatant was filtered through the 0.45 μm membrane after centrifugation, and then pH was adjusted to 1 and left to stand at 4 o C for 12 h. After centrifugation, the supernatant was FA, while the precipitate was dissolved with 0.05 M NaHCO 3 to obtain HA. The total organic carbon was measured to represent HA and FA content (Zhu et al 2021;Li et al 2021b). To measure ammonia nitrogen (NH 4 + -N) and nitrate nitrogen (NO 3 − -N) concentration, fresh samples were shaken with 2 mol•L −1 KCl (1:10 ratio) at 200 rpm for 1 h. Then the filtrates were assayed by NaRSH'S colorimetry and UV-spectrophotometry (Yu et al 2021).…”

Section: The Physicochemical Property Determinationmentioning

confidence: 99%

“…The heavy metal content was measured by the digestion method using concentrated acid (Cui et al 2020). The four forms of heavy metal, acid-soluble fraction (F1), reducible fraction (F2), oxidizable fraction (F3) and residual fraction (F4), were extracted by the modified BCR sequential extraction method (Li et al 2021b).…”

Section: The Physicochemical Property Determinationmentioning

confidence: 99%

“…This might be the reason for the decrease of bioavailability of heavy metals. Previous studies have found that organic substances combined with heavy metals through adsorption and coordination during composting (Li et al 2021b;Zhang et al 2017), reducing the bioavailability of heavy metals. Therefore, it was inferred from the results of correlation analysis that embedded materials strengthened the combination of organic substances and heavy metals, thereby promoting the passivation of heavy metals.…”

Section: Response Characteristic Of Different Microbial Groups In Hea...mentioning

confidence: 99%

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Biochar mitigates the biotoxicity of heavy metals in livestock manure during composting

Chen

Liú

et al. 2022

Biochar

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The addition of biochar could mitigate the bioavailability of heavy metals during livestock manure composting. However, the main action mechanism of biochar, such as how it worked, was ambiguous. Therefore, in this study, materials (biochar, alkali modified biochar, pretreated cotton ball) were added by embedding with nylon mesh bags to explore the adsorption performance of added materials and its influence on the composting process. The results showed that embedded materials promoted the formation of humic acid and reduced the distribution proportion of bioavailable fraction of heavy metals during composting (Cu: at least 15.72%; Zn: at least 33.44%). The surface of biochar extracted from composting contained attachments, however, the attachment of heavy metal was not detected and functional groups on the materials did no change significantly. This indicated that the addition of biochar did not directly adsorb heavy metals. Most notably, the microbial network changed after embedding materials, and the succession of microbial community promoted the formation of humic acid. Ultimately, structural equation models verified that embedded materials promoted the formation of humic acid through stable microbial groups, thereby accelerating the passivation of heavy metals during composting. This study provides theoretical and technical supports for mitigating the biotoxicity of heavy metals by biochar during composting. Graphical Abstract

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Effects of swine manure composting by microbial inoculation: Heavy metal fractions, humic substances, and bacterial community metabolism

Cited by 74 publications

References 55 publications

Radical-induced rapid humification of waste milk and the performance of derived slow release fulvic-like fertilizer

Radical-induced rapid humification of waste milk and the performance of derived slow release fulvic-like fertilizer

Interruption after Short-Term Nitrogen Additions Improves Ecological Stability of Larix olgensis Forest Soil by Affecting Bacterial Communities

Biochar mitigates the biotoxicity of heavy metals in livestock manure during composting

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